So here they are, one of World’s Biggest Construction Vehicles. Bagger 288
The Bagger 288 (Excavator 288), built by the German company Krupp for the energy and mining firm Rheinbraun, is a bucket-wheel excavator or mobile strip mining machine. When its construction was completed in 1978, Bagger 288 superseded NASA's Crawler-Transporter, used to carry the Space Shuttle and Apollo Saturn V launch vehicle, as the largest land vehicle in the world at 13,500 tons.
To put it lightly, the Bagger 288 is a bucket-wheel excavator. But there’s nothing light about a 13,500-ton mobile strip miner. The German creation is 721 feet long, 315 feet high, and can clear an area the size of a football field three stories deep—in just one day.
Source : Mydoubts.net and Wikipedia